Electrical spotlight construction affording economical assembly and easy manipulation

ABSTRACT

The spotlight comprises a central ring structure swingably mounted within a fixed bail, and carrying a releasable rear casing part which is a shell holding the lamp socket, and a releasable front tubular casing part holding an adjustably positioned lens. The ring structure comprises two concentric rings connected by a web having openings. The casing parts are on opposite ends of the outer ring. A shell serving as a reflector, extends into the rear casing part, and has an outward flange around its mouth which bears against the forward end of the inner ring. The reflector is through the inner ring. Setscrews through tabs on the inner ring, engage the reflector. A straight lamp extends from its socket mounted in the rear casing part, and through an apex hole in the reflector. The ring structure is spanned by an adjustable light beam framing structure.

United States Patent 2,914,660 11/1959 Wrigglesworth 240/3(X) 3,116,022 12/1963 Davis s. 240/3 3,307,028 2/1967 Bentham 240/46.03

Primary ExaminerSamuel S. Matthews Assistant Examiner-E. M. Bero Attorney--M. D. Nissenbaum ABSTRACT: The spotlight comprises a central ring structure swingably mounted within a fixed bail, and carrying a releasable rear casing part which is a shell holding the lamp socket, and a releasable front tubular casing part holding an adjustably positioned lens. The ring structure comprises two concentric rings connected by a web having openings. The casing parts are on opposite ends of the outer ring. A shell serving as a reflector, extends into the rear casing part, and has an outward flange around its mouth which bears against the forward end of the inner ring. The reflector is through the inner ring. Setscrews through tabs on the inner ring, engage the reflector. A straight lamp extends from its socket mounted in the rear casing part, and through an apex hole in the reflector. The ring structure is spanned by an adjustable light beam framing structure.

ELIEQTRKCAL SllO'lLllGl-KT CQNSTRUCTHGN Alilflltllllhltl ECONGMHCAL ASfiEMBLY ANll) EASY MANHPULATRGN The present invention relates to electrical spotlights.

An object of this invention is to provide an electrical spotlight of novel and improved construction, comprising a casing capable of being supported in a desired manner, and which will house a socket, its bulb with reflector, and also if desired, a light projecting lens and a light-framing adjustable shutter therefor.

Another object thereof, is to provide an electrical spotlight of the character described, of novel and improved construction, in which a single central ring member from which the device is mounted onto a support, is the common mounting member and support for most of the other parts. This not only simplifies the construction, but attains substantial economy in assembly in mass production, and convenience to the user in making replacements. At the factory, the central ring is held stationary, thus making it easy to mount the other components thereon in a minimum of time. The user can easily replace the bulb without disturbing the lens or framing-shutter setting.

Other objects and advantages will become apparent as this disclosure proceeds.

For one practice of this invention, a central ring structure which is a casting, offers means to mount the spotlight and serves as the common mounting member for the reflector, a rear casing part holding the lamps socket, a front casing part holding a lens, and an adjustable framing shutter for the light beam. The casing parts are separately removable. Such dismantling, in no manner effects the mounted reflector or the light-framing means. Openings in said ring and casing parts afford air circulation to avoid any undue overheating by the lamp which preferably is of the halogen quartz type.

In the accompanying drawing forming part of this specification, similar characters of reference indicate corresponding parts in all the views.

FlG. l is a perspective view showing a spotlight embodying the teachings of this invention.

H6. 2 is an enlarged central longitudinal section taken at line 2-2 in H6. ll.

FIG. 3, is an enlarged perspective view of the central ring structure which serves as said common mounting member,

FlG. d is a perspective bottom view of FIG. 3.

HO. 5 is a perspective view of the front casing part.

FIG. 6 is a section taken at line 6-6 in FIG. 2, showing in particular, the adjustable light beam framing shutter device.

PEG. 7 is an exploded view showing the parts of said shutter device in perspective.

in the drawing, the electrical spotlight designated generally by the numeral 15, comprises a central ring structure denoted generally by the numeral 16, having horizontally aligned oppositely extending external bosses 117 which are threaded to receive the distal ends of a hanging bail l8, and such ring structure is adapted for mounting thereto a front tubular casing 39, provided with a lens 20, and for mounting a rear casing 2i carrying the socket 22, for the single ended straight halogen quartz incandescent lamp 23, and as well as for mounting the reflector 24 which encircles the lamp and is positioned with its mouth towards lens end of the spotlight, and also for mounting a light beam framing shutter indicated generally by the numeral 25.

The ring structure in illustrated, comprises an outer, comparatively short tubular member 26 having end sections 27,28 of slightly reduced diameter to provide stop shoulders 39 and 211 for the mouth rims of the casing parts 19 and 21 respectively. There is an inner ring 29, held concentrically within the outer tube 26, by connecting elements having openings 30 therethrough; such inner ring being at that end of the tube it onto which the the mouth end of the rear casing part 21 is received. In such casing part and coaxially therewith, extends a reflector 24 having an apex hole 24, through which extends the lamp 23; the mouth rim of said reflector having an outwardly extending flange 24" which rests against the inner end of the inner ring 29; said reflector being through such inner ring and is releasably secured thereto by setscrews 3i which are through tabs 32 extending from the outer rim of said inner ring 29; the tapped holes 37 in said tabs receiving such setscrews, being in a plane outside the outer ring 26, so such setscrews are accessible. The front tubular casing part 1.9, both casing parts tapering towards their free distal ends, has a cylindrical terminal section 19' in which is mounted a projection lens 20 within a slidable tubular mount 34 therefor, provided with adjustment means indicated generally by the numeral 33, in manner well known in this art; said tubular components 19' and 34, being in telescopic relation. Ventilation openings 35' and 36 are provided in the walls of the casing parts. A plurality of thumbscrews 35, releasably secure the casing part 19 to the central tubular structure in, and similar means 36 are provided for the casing part 21.

A light beam framing means 25 may be included by having within the tubular member 26, the e'quispaced internal bosses 38 which come flush with the end of the said tubular member which receives the casings front part 159, where the face of each of said bosses presents a threaded hole for a bolt as 39, to hold in assembly the three flat rings 40,41,412 separated by washers as 43 at bolt positions. in the space between the flat rings 40,41, are the vertically movable shutters 44,45, whose handles 44, 45' project outwardly so said shutters can be manipulated. In the space between the flat rings 41,42, are similar, but horizontally movable shutters 46,47, whose handles 46, 47 likewise extend to be accessible. In FIG. 6, the framing shutters are positioned to confine the issuing light rays to the rectangle ABCD. The shutters may be shifted so that the frame effected is other than rectangular, to light up irregular areas on the surface the light finally reaches.

This invention is capable of numerous forms and various applications without departing from the essential features herein disclosed. it is therefore intended and desired that the embodiment shown herein shall be deemed merely illustrative and not restrictive and that the patent shall cover all patentable novelty herein set forth; reference being had to the following claims rather than to the specific showing and description herein, to indicate the scope of this invention.

l claim:

i. In an electrical spotlight, a central mounting ring structure, means thereon for mounting said ring structure on a support for the device, a first casing part constituting a shell, an electrical socket mounted in the shell for receiving an electrical incandescent lamp to extend towards the mouth of the shell, a second casing part comprising a tubular member; the mouth end of the shell being fitted on one end of the ring structure; an end of the second casing part fitted on the other end of said ring structure, means releasably holding said casing parts and the ring structure in assembly; said ring having an internal ring concentric therewith, means connecting said rings between the casing parts, a shell reflector having an external flange around its mouth rim; said reflector extending through the inner ring into the first casing part with its mouth rim flange bearing against that end of the inner ring which is most remote from said socket; said reflector having an opening for the lamp to extend therethrough, and means on the inner ring, releasably holding the reflector in assembly therewith, comprising a plurality of tabs extending from the rim of said inner ring which is nearest the second casing part, and which are integral therewith and easy accessible when the second casing part is off the ring structure, and setscrews through and threadedly engaged in said tabs, bearing against the reflector.

2. in an electrical spotlight, a central mounting ring structure, means thereon for mounting said ring structure on a support for the device, a first casing part constituting a shell, an electrical socket mounted in the shell for receiving an electrical incandescent lamp to extend towards the mouth of said shell, a second casing part comprising a tubular member; the mouth end of the shell being fitted on one end of the ring structure; an end of the second casing part fitted on the out side of the other end of said ring structure, means releasably holding said casing parts and the ring structure in assembly; said ring having an internal ring concentric therewith, means connecting said rings between the casing parts, a shell reflector having an external flange around its mouth rim; said reflector extending through the inner ring into the first casing part with its mouth rim flange bearing against that end of the inner ring which is most remote from said socket; said reflector having an opening for the lamp to extend therethrough, means on the inner ring, releasably holding the reflector in assembly therewith, an adjustable light beam framing means mounted across that end of the ring structure which is within the second casing part; said light beam framing means including movable shutter elements determining an opening for the light beam, and handles to move said shutters, extending through openings in the wall of the second casing part, a plurality of bosses inside the ring structure, extending from its inner surface; end faces of said bosses being substantially coplanar with the rim edge of said ring structure which is interior the second casing part; each of said boss faces having a threaded hole thereinto, flat rings in spaced superposed relation having holes in registry with said threaded holes, spacer washers between said flat rings at each boss end, and screws through the holes in said flat rings and the washers, threadedly engaging in said threaded holes whereby said flat rings are held in assembly on the ring structure; said shutter elements being flat plates positioned between said flat rings and in frictional sliding contact therewith; each of the shutter plates having one of the handles extending therefrom; each shutter plate extending across the inner holes of the flat rings, whereby on movement of said shutter plates different extents of said inner holes of the flat rings are obstructed.

3. An electrical spotlight as defined in claim 2, wherein the number of flat rings is three and the number of shutter plates is four; a pair of plates being between the intermediate flat ring and one of the others respectively; opposing edges of one pair of shutter plates being substantially generally perpendicular to the opposing edges of the other pair of shutter plates.

4-. An electrical spotlight as defined in claim 3, wherein said opposing plate edges are straight whereby the area determined between said edges is a rectangle.

5. An electrical spotlight as defined in claim 3, wherein the shutter plates are movable in a plurality of directions. 

1. In an electrical spotlight, a centRal mounting ring structure, means thereon for mounting said ring structure on a support for the device, a first casing part constituting a shell, an electrical socket mounted in the shell for receiving an electrical incandescent lamp to extend towards the mouth of the shell, a second casing part comprising a tubular member; the mouth end of the shell being fitted on one end of the ring structure; an end of the second casing part fitted on the other end of said ring structure, means releasably holding said casing parts and the ring structure in assembly; said ring having an internal ring concentric therewith, means connecting said rings between the casing parts, a shell reflector having an external flange around its mouth rim; said reflector extending through the inner ring into the first casing part with its mouth rim flange bearing against that end of the inner ring which is most remote from said socket; said reflector having an opening for the lamp to extend therethrough, and means on the inner ring, releasably holding the reflector in assembly therewith, comprising a plurality of tabs extending from the rim of said inner ring which is nearest the second casing part, and which are integral therewith and easy accessible when the second casing part is off the ring structure, and setscrews through and threadedly engaged in said tabs, bearing against the reflector.
 2. In an electrical spotlight, a central mounting ring structure, means thereon for mounting said ring structure on a support for the device, a first casing part constituting a shell, an electrical socket mounted in the shell for receiving an electrical incandescent lamp to extend towards the mouth of said shell, a second casing part comprising a tubular member; the mouth end of the shell being fitted on one end of the ring structure; an end of the second casing part fitted on the outside of the other end of said ring structure, means releasably holding said casing parts and the ring structure in assembly; said ring having an internal ring concentric therewith, means connecting said rings between the casing parts, a shell reflector having an external flange around its mouth rim; said reflector extending through the inner ring into the first casing part with its mouth rim flange bearing against that end of the inner ring which is most remote from said socket; said reflector having an opening for the lamp to extend therethrough, means on the inner ring, releasably holding the reflector in assembly therewith, an adjustable light beam framing means mounted across that end of the ring structure which is within the second casing part; said light beam framing means including movable shutter elements determining an opening for the light beam, and handles to move said shutters, extending through openings in the wall of the second casing part, a plurality of bosses inside the ring structure, extending from its inner surface; end faces of said bosses being substantially coplanar with the rim edge of said ring structure which is interior the second casing part; each of said boss faces having a threaded hole thereinto, flat rings in spaced superposed relation having holes in registry with said threaded holes, spacer washers between said flat rings at each boss end, and screws through the holes in said flat rings and the washers, threadedly engaging in said threaded holes whereby said flat rings are held in assembly on the ring structure; said shutter elements being flat plates positioned between said flat rings and in frictional sliding contact therewith; each of the shutter plates having one of the handles extending therefrom; each shutter plate extending across the inner holes of the flat rings, whereby on movement of said shutter plates different extents of said inner holes of the flat rings are obstructed.
 3. An electrical spotlight as defined in claim 2, wherein the number of flat rings is three and the number of shutter plates is four; a pair of plates being between the intermediate flat ring and one of the others respectIvely; opposing edges of one pair of shutter plates being substantially generally perpendicular to the opposing edges of the other pair of shutter plates.
 4. An electrical spotlight as defined in claim 3, wherein said opposing plate edges are straight whereby the area determined between said edges is a rectangle.
 5. An electrical spotlight as defined in claim 3, wherein the shutter plates are movable in a plurality of directions. 